The can bus can tolerate +-12VDC. Actually, something like the TJA1051T can take +-58V. The problem is that when there is a short on the can bus, you can't comm

The can bus can tolerate +-12VDC. Actually, something like the TJA1051T can take +-58V. The problem is that when there is a short on the can bus, you can't communicate over it. It isn't magic. I don't know what the exact problem in this case was, but I've seen it where the ABS module self destructed, and because it was on the same bus as the ECU and BCM, the BCM wasn't able to tell the ECU to start.